The CC510 is a high end monaural noise canceling headset top that provides, arguablly the best sound of any headset on the market. Sennheiser has long been known for the audio quality in the music business. They bring their 75 years of audio expertise to the headset industry. The CC510, like all Sennheiser tops works on the SC911-15A 6 wire push to talk dispatch amplifier.